This was an interesting essay on the immigration crisis in Central America, and more specifically how the US is reacting to it. The book focuses on child immigrants who are generally fleeing CA countries (south of Mexico), primarily from gang violence. Luiselli very briefly tells a few stories of the travel experience across Mexico (coyotes hired to help ferry children across the region, riding la bestia across Mexico alone), and then the experience in the USA. Generally, in the US children immediately turn themselves in to border patrol (rather than risk dying in the southwest desert). They are put into ICE boxes, then usually joined with a guardian, and then await immigration trial. The bulk of the essay has to do with the hardship that these children face during these trials, and how difficult it often is for them to secure a lawyer in the US willing to defend them (often for free), particularly if they can't produce physical evidence of the violence they are trying to flee from (e.g. a police report from their home country, which most cannot). Luiselli and her daughter are volunteer translators for the children.
Obviously, this isn't anywhere near comprehensive either as a description of current immigration practices, or of the immigrant experience. It isn't meant to be. Nor does it propose any kind of policy prescription. But it is a compelling and deeply human set of anecdotes that clearly illustrate the problem.